22001022222021 has 24 divisors (see below), whose sum is σ = 32077519119360. Its totient is φ = 14529743797536.

The previous prime is 22001022222017. The next prime is 22001022222037. The reversal of 22001022222021 is 12022222010022.

22001022222021 is a `hidden beast` number, since 2 + 200 + 1 + 0 + 222 + 220 + 21 = 666.

It is not a de Polignac number, because 22001022222021 - 2² = 22001022222017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22001022221985 and 22001022222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001022222721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2347660 + ... + 7036586.

It is an arithmetic number, because the mean of its divisors is an integer number (1336563296640).

Almost surely, 2^{22001022222021} is an apocalyptic number.

It is an amenable number.

22001022222021 is a deficient number, since it is larger than the sum of its proper divisors (10076496897339).

22001022222021 is a wasteful number, since it uses less digits than its factorization.

22001022222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693825 (or 4693822 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22001022222021 its reverse (12022222010022), we get a palindrome (34023244232043).

The spelling of 22001022222021 in words is "twenty-two trillion, one billion, twenty-two million, two hundred twenty-two thousand, twenty-one".